Biogeochemical Cycle Review

The movement of matter through biotic and abiotic environment is called ___

• matter cycling
• biogeochemical cycle
• photosynthesis
• carbon fixation

Matter cannot be made or destroyed

• true
• false

When plants release water through their stomata, this is called ___.

• condensation
• evaporation
• transpiration
• condensation

Carbon is recycled mostly through

• transpiration
• photosynthesis and respiration
• condensation
• mountain formation

Carbon is dissolved into  ___. 

• the ocean
• the atmosphere
• animal bones
• photosynthesis

What organism takes in carbon in the form of CO₂

• plants, during photosynthesis
• animals, during respiration
• plants, during respiration
• animals, during reproduction

With fewer plants there will be greater ___ in the air. 

• O₂
• CO₂
• water
• respiration

Most of the nitrogen (N₂) is taken up from the atmosphere by...

• soil bacteria
• trees and flowering plants
• humans
• algae

Nitrogen in the soil has been fixed by bacteria. It is now available for use by ___. 

• humans
• plants
• fungi
• the water cycle

Denitrifying bacteria feed on _______, releasing nitrogen gas back into the atmosphere. 

• dead plants and animals
• living soil
• water
• algae